The author's biographical note is supposed to make it pretty clear why he was led to write this book in a language almost completely foreign to his everyday world.

This book is the offspring of twodifferent states of mind, initially, in the spring of 2020, thepurpose was to overcome the boresome loneliness of the confinementimposed by the widespread pandemic, and thus an argumentative essaywas constructed, titled ? in a rather technical style: The exacttrianglature of the semicircle in the 20th century USA ? andeventually uploaded, as a critical paper, on the Academia.edu internet platform. Then suddenly, last autumn, the surprising news that apirated edition of this article was being sold in Central Europe (inGermany and Switzerland, at least) in e-book format, seemingly anauspicious omen, rang a bell: the main project was feasible.

The main project, now the purpose of this book, is to documentglobal citizenship about a well-hidden case of corporate wrongdoing.Really, never in the history of science, not even in the time of thePythagoreans twenty-five centuries ago, has a corporation ofscientists ever gone so far in covering up a scientific feat owing tomere and vulgar sectarianism as the various guilds of mathematicians,principally the International Mathematical Union, over the last fourdecades. On a certain page of this book, the reader will find, written in just two lines of text in elementary symbolic notation, amathematical proof dating from the late 1970s which the internationalscientific communities in the field and not only had been looking forsince 1665? and was then buried alive.

To definitely andopenly prove that proof wrong or, if impossible, to definitively,competently and honestly recognize its perfect exacteness is thechallenge left here to the IMU as the champion of all mathematicalsocieties in the world: in a word, to this august, long-stealthyMathemafia.